declare function javascript let code example
Example 1: const let var scope
var num = 1; //var can be function or global scoped
const num = 2; //const can only be block scoped
let num = 3; //let can only be block scoped
Example 2: let in javascript
The let statement declares a block scope local variable, optionally initializing it to a value.
let x = 1;
if (x === 1) {
let x = 2;
console.log(x);
// expected output: 2
}
console.log(x);
// expected output: 1